fix(auth): remove add to ws in user creation

[EFF]

Description

Users were "created" while being added to allowed workspaces but users were created first, meaning we created users twice. I simply moved the code to pro auth-strategies so we get the expected behaviour

Created a docker image, deployed on an instance, configured auth strategies, created users and single user was created as of before it was doubled. (doubly checked by @sebburon )
If you want to try it yourself, pull effit/bp:signon docker image on docker hub

Fixes botpress/v12#1550
Closes DEV-2007

• Bug fix (non-breaking change which fixes an issue)

[linear]

DEV-2007 [BUG] New admins are added as developers (botpress/borpress botpress/v12#1550)

Describe the bug
When adding a new admin collaborator to a workspace, that user is also added as a developer and cannot see

To Reproduce

1. Deploy an instance of Botpress with Docker
2. Go to "Collaborators" and add a new collaborator with the "Administrator" role
3. The new user is added as bot an admin and a developer

Expected behavior
The added user should be an admin only.
Screenshots

Environment (please complete the following information):

• OS: Docker
• Browser Chrome
• Botpress Version 12.26.6 and 12.26.7

botpress/borpress botpress/v12#1550 by @ Gordon-BP

[sebburon]

I tested this, and it works.

[allardy]

Actually the user was not created twice, but he was added twice to the workspaces (when you create the user manually, he's created with the default role & the one you selected). I see two scenarios possible:

1. Adding a user via the collaborator page on the admin panel. This email/strategy will be added to the specified workspace only, with the selected role. If a user is added manually once, he will not be added to the other workspaces when he logs on the first time
2. A user logs on with a configured IDP. We add that user to each workspaces configured with that strategy with the default role of that workspace

I'm not sure if there's other scenarios, but overall LGTM

[allardy]

LGTM